Computer Computer Hardware User Manual

2-18
MS-9802 Mainboard
LCD Power Source Jumper: J7
This jumper is used to select the power source of LCD.
Pin Signal
1 VCC3
2 LCD_SRC (default VCC3)
3 VCC5
Pin Definition
5V
1
3.3V
1
J7
1
COM Port Power Jumpers: J2, J3, J4, J5
These jumpers specify the operation voltage of the serial port COM1~4.
5V
1
12V
1
Pin Signal
1 VCC12F
2 VCC_COM
3 VCC5F
Pin Definition
J2 -> COM2
J3 -> COM1
J4 -> COM4
J5 -> COM3
1
1
1
1